PLUMER/PARKER Late 1700's

I am looking for the parentage of Ambrose PLUMER Parker. He was born in New York State February 5, 1798.He married Ruby Metcalf July 29, 1823 in New York. They had a son named Isaac PLUMMER Parker born December 4, 1830 in Brookfield, Tioga Co, PA where the family settled. Some sources list his parents as Levi Parker and Rebecca Doty and his place of birth as Granville, Washington Co, NY. However upon close inspection no evidence of the family can be found. Since the names PLUMER and PLUMMER were used, I thought that there just may be a connection. This is called a "last ditch effort". If anyone recognizes these facts, please respond. E-mail me directly at ROLANDM567@aol.com. Many thanks in advance.